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Article Dans Une Revue Journal of Applied Electrochemistry Année : 1994

Kinetic-study of electrochemical reactions at catalyst-recast ionomer interfaces from thin active layer modeling

Résumé

The objective of the following study was to test proton exchange membrane fuel cell catalysts. A mixture of supported catalyst and recast ionomer (Nafion®) was deposited on a rotating disc electrode (RDE). The resulting thin active layer was immersed in a dilute sulphuric acid solution. The RDE technique allows correction of mass transfer limitation in solution. To calculate the kinetic parameters from the current-potential relation, a mathematical model was written taking into account gas diffusion, ohmic drops and interfacial kinetics within the thin layer. Analytic and/or numerical expressions for the effectiveness factor and for the current-potential relation were obtained. The oxygen reduction reaction at various Pt/C-recast Nafion® interfaces demonstrates the validity of this test procedure.

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Chimie

Dates et versions

hal-02283965 , version 1 (11-09-2019)

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Citer

Frédéric Gloaguen, F. Andolfatto, R. Durand, P. Ozil. Kinetic-study of electrochemical reactions at catalyst-recast ionomer interfaces from thin active layer modeling. Journal of Applied Electrochemistry, 1994, 24 (9), pp.863--869. ⟨10.1007/bf00348773⟩. ⟨hal-02283965⟩

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